LAS VEGAS -- Samsung debuted its Youm flexible-display technology at CES' closing keynote, and the tech is nothing short of eye-popping.

The screens, which were shown off here as just a concept, promise to change what kind of form factors are possible for companies that make smartphones and tablets.

Samsung brought out a handful of demo units around 5-inches in size to show press, including a phonelike device with a screen that wraps around the side edges and could therefore display information like text messages and other alerts without a user needing to view the entire screen. A similar design puts the wraparounds on the bottom, while another concept (shown off in a video) rolled out like a scroll.